ORDER 122.—THE WILLOWORTS. 281 
1 B.excel’sior. Yellow Birch. Tree 50-80f. Fertile aments erect, oblong, 1 inch 
in length, erect, sterile 2-4’, pendulons, clustered. ¢« N. 
2 Blenta. Bluck B. Sucet B. Tree 40-60f. Fertile aments erect, oval, obtuse, 
stalked; sterile 2-3’, pendulous. Inner bark sweet-spicy. M. N. 
8 B. ni’gra. Red Birch. Tree 30-50f. Leaves rhombic-ovate, acute at both ends, 
obscurely lobed. Fertile aments sessile, ovoid. M.S. W. 
4B populifo’lia. White B. Tree 80-40f. Leaves triangular, long-pointed, 
smooth, unequally serrate. Sterile aments long, pendulous. N. 
5 B. papyra’cea. Canoe Birch, Tree 50-70f. Leaves ovate, pointed, doubly- 
serrate. All the aments nodding. Hillsand mountains. N. 
6 B.pum’ila) Dwarf B. Shrub erect, 2-6f. Branches warty. Leaves obovate, ob- 
tusely serrate above. Fertile aments cylindric. Mountains. N. 
7 B.na’na. Tiny B. Shrub low, trailing, smooth. Leaves round, crenate. Scales 
of fertile ament deeply 3-parted. 8-12’. Mountains. N.-H 
Orver CXXII. SALICACEH. The Willeworts. 
Trees or shrubs, with simple leaves, and stipules usually present; 
Jlowers dicecious, naked, both kinds in aments, each with a bract; 
ovary 1 or 2-celled, with 2 short styles; capsule many-seeded ; 
seeds with a coma and no albumen. 
Fig. 684. A fertile flower of a Willow, consisting of a pisti] and a bract Fig. 635. Sterile 
flower, 2 stamens and a bract. Fig. 636. A sterile flower of Balm-of-Gilead (Populus candi- 
cans); many stamens. Fig, 687. A fertile flower, consisting of a fringed scale, a calyx holding 
a double ovary. 
Analysis of the Genera. 
§ Aments cylindric, bracts entire. Stamens 2 or more. Capsule 1-celled, 2- 
valved, the seeds very small, clothed with silky hairs. Trees or shrubs. 
Leaves often long and narrow. (Figs. 12, 17, 88. ) We have about 27 spe- 
cies. Willow, Oster. Satrx. 
§ Aments cylindric, bracts fringed. Stamens 8 or more. Capsule 2-celled, 2 
valved. Calyx an entire cup. Buds varnished with a fragrant resin. 
Leaves broad, large. Trees. Poplar. Aspen. Poputvs 
